I have a customer with on premise 3cx running the latest version. In the warehouse they wanted three PA speakers with talk back so I am installing three Grandstream GSC-3510 speakers. I currently have them setup as different users and in a page group. When I page the group, the talk back portion does not work. When i page each user individually, I can talk back with no problem. I have tried putting all three devices under the same user and when I page, only the first device in the list has the ability to talk back. I also looked for an intercom dial code to try with the group extension but I have not found a code that works either.
Any advice would be appreciated.
Any advice would be appreciated.
